'Abdullah bin 'Umar Radiyallahu 'Anhu related the same hadith from Rasulullah Sallallahu 'Alayhi Wasallarn that:
"Verily use the kuhl made from ithmid. It brightens the vision and strengthens the growth of the eye lashes". (ES)
English reference (ES): Book 7, Hadith 52 (ES)
Arabic reference (ES): Book 7, Hadith 53 (ES)